For transition and noble metals experience shows that the Fermi surfaces obtained from density-functional calculations, using the local approximation (LDA), are accurate to within relative shifts of the s-, p- and d-band positions by +or-10 mRy. For the heavy-electron material UPt3 the LDA yields a Fermi surface which is mainly of U-f5/2 and Pt-p-d character. This Fermi surface agrees with recent de Haas-van Alphen experiments to within shifts of the Pt-pd relative to U-f of approximately=7 mRy and relative shifts of the U-f5/2 individual mj subbands of merely +or-2 mRy. The latter splittings seem to be of the same order of magnitude as the U-f5/2 crystal field splittings. The ratios of the experimental to LDA masses range from 10 to 30 in UPt3.
 

Journal of Magnetism and Magnetic Materials, 76-77 23-9, 1988.